-82.41% is the change from 978 to 172
Calculation steps:
[( 172 - 978 ) ÷ 978] x 100 = -82.41%
Formula
Percentage change = [(172 - 978) / 978] x 100
Subtract the new number by the original number
172 - 978 = -806
-806 ÷ 978 = -0.8241308793456033
-0.8241308793456033 x 100 = -82.41%